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解分式方程要通过去分母使它转化为整式方程,也就是要把未知数从分母的位置移出来,从而扩大了未知数的取值范围,去分母的
To solve the fractional equation to denominator to make it into an integral equation, that is, the unknowns should be moved out of the denominator, thereby expanding the range of unknown values to the denominator